diff --git a/launcher/InstanceList.cpp b/launcher/InstanceList.cpp
index 7c4997cf9..8f58d9f39 100644
--- a/launcher/InstanceList.cpp
+++ b/launcher/InstanceList.cpp
@@ -64,7 +64,7 @@
 #include "settings/INISettingsObject.h"
 
 #ifdef Q_OS_WIN32
-#include <Windows.h>
+#include <windows.h>
 #endif
 
 const static int GROUP_FILE_FORMAT_VERSION = 1;